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crypto: mv_cesa - Make the copy-back of data optional
Make the copy-back of data optional (not done in hashing requests) Signed-off-by: Uri Simchoni <uri@jdland.co.il> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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parent
a58094ac5f
commit
f0d03deaad
1 changed files with 27 additions and 22 deletions
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@ -40,6 +40,7 @@ enum engine_status {
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* @src_start: offset to add to src start position (scatter list)
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* @crypt_len: length of current crypt process
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* @hw_nbytes: total bytes to process in hw for this request
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* @copy_back: whether to copy data back (crypt) or not (hash)
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* @sg_dst_left: bytes left dst to process in this scatter list
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* @dst_start: offset to add to dst start position (scatter list)
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* @hw_processed_bytes: number of bytes processed by hw (request).
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@ -60,6 +61,7 @@ struct req_progress {
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int crypt_len;
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int hw_nbytes;
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/* dst mostly */
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int copy_back;
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int sg_dst_left;
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int dst_start;
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int hw_processed_bytes;
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@ -267,33 +269,35 @@ static void dequeue_complete_req(void)
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struct crypto_async_request *req = cpg->cur_req;
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void *buf;
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int ret;
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int need_copy_len = cpg->p.crypt_len;
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int sram_offset = 0;
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cpg->p.hw_processed_bytes += cpg->p.crypt_len;
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do {
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int dst_copy;
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if (cpg->p.copy_back) {
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int need_copy_len = cpg->p.crypt_len;
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int sram_offset = 0;
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do {
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int dst_copy;
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if (!cpg->p.sg_dst_left) {
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ret = sg_miter_next(&cpg->p.dst_sg_it);
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BUG_ON(!ret);
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cpg->p.sg_dst_left = cpg->p.dst_sg_it.length;
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cpg->p.dst_start = 0;
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}
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if (!cpg->p.sg_dst_left) {
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ret = sg_miter_next(&cpg->p.dst_sg_it);
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BUG_ON(!ret);
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cpg->p.sg_dst_left = cpg->p.dst_sg_it.length;
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cpg->p.dst_start = 0;
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}
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buf = cpg->p.dst_sg_it.addr;
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buf += cpg->p.dst_start;
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buf = cpg->p.dst_sg_it.addr;
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buf += cpg->p.dst_start;
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dst_copy = min(need_copy_len, cpg->p.sg_dst_left);
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dst_copy = min(need_copy_len, cpg->p.sg_dst_left);
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memcpy(buf,
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cpg->sram + SRAM_DATA_OUT_START + sram_offset,
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dst_copy);
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sram_offset += dst_copy;
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cpg->p.sg_dst_left -= dst_copy;
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need_copy_len -= dst_copy;
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cpg->p.dst_start += dst_copy;
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} while (need_copy_len > 0);
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}
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memcpy(buf,
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cpg->sram + SRAM_DATA_OUT_START + sram_offset,
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dst_copy);
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sram_offset += dst_copy;
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cpg->p.sg_dst_left -= dst_copy;
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need_copy_len -= dst_copy;
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cpg->p.dst_start += dst_copy;
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} while (need_copy_len > 0);
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BUG_ON(cpg->eng_st != ENGINE_W_DEQUEUE);
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if (cpg->p.hw_processed_bytes < cpg->p.hw_nbytes) {
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@ -336,6 +340,7 @@ static void mv_enqueue_new_req(struct ablkcipher_request *req)
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p->hw_nbytes = req->nbytes;
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p->complete = mv_crypto_algo_completion;
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p->process = mv_process_current_q;
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p->copy_back = 1;
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num_sgs = count_sgs(req->src, req->nbytes);
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sg_miter_start(&p->src_sg_it, req->src, num_sgs, SG_MITER_FROM_SG);
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